| 年度 | 实际值 |
|---|---|
| 1992 | 40.9 |
| 1993 | |
| 1994 | |
| 1995 | 42.2 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 43.1 |
| 2000 | 43.4614 |
| 2001 | 43.3296 |
| 2002 | 43.2689 |
| 2003 | 43.2197 |
| 2004 | 43.629 |
| 2005 | 44.82 |
| 2006 | 44.73 |
| 2007 | 44.33 |
| 2008 | 44.42 |
| 2009 | 45.492 |
| 2010 | 45.1983 |
| 2011 | 45.6936 |
| 2012 | 45.7339 |
| 2013 | 46.0728 |
| 2014 | 44.02 |
| 2015 | 44.12 |
| 2016 | 45 |
| 2017 | 45 |